Thermodynamic characterization of transient valve temperatures in diesel engines using probabilistic methods
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Pardeep Kumar
,
Anikate Gupta
Abstract
This investigation aimed to predict the temperature distribution in the inlet and exhaust valve and isotherms to the cooling media at a given load of a diesel engine. For the analysis that has been done a Tata- Mercedes diesel engine with 90 mm bore diameter and Stroke length of 120 mm was analysed using FEM through Ansys workbench 15.0. Steady as well as transient cases were considered in combination. The temperature distribution and isotherms are computed and plotted using Ansys. The results obtained by Ansys workbench 15.0 were satisfactory and were in line when compared with finite differential analysis. There is a large temperature variation along the length of the valve. It may vary from 560 °C to 110 °C from tip to valve head in the exhaust valve while this variation is less in the case of inlet valve from 540 °C to 100 °C from the face to the tip. The linear temperature difference between the nodes at the base of the stem to the node at the center of the face increases with time and acquires the maximum value of about 120 °C at about 10 s then it decreases till the valve attains a steady state value. Thus, was observed from analysis that during this time there is a maximum probability of failure of valves due to linear differences in temperature.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: All other authors state no conflict of interest.
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Research funding: None declared.
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Data availability: Not applicable.
Nomenclature
- d
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valve stem diameter
- hb, hs
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bush and valve seat coefficient heat transfer in Kcal/m2hr°C
- ha,he
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valve and incoming air coefficient of heat transfer for exhaust gases hf natural convection coefficient heat transfer
- hg(ϕ),hgm
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prompt and average values of heat transfer coefficients
- ha
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heat transfer coefficient between inlet air and valve due to natural and Kf thermal conductivity of the fluid
- Nu
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Nusselt number, hd/kf
- Pg(ϕ)
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Pressure at any crank angle ?
- Prf
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Prandtl number of fluid.Ref Reynolds number, vfd/vf
- s
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Mean piston speed, m/s
- Ta,t0,tf
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Temperature of ambient air, outward exhaust gases and inward air Tb,ts temperature of bush and sheet of valves
- Tgr
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final gas temperature
- t 2-t 1
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differential temperature between surface and fluid in convection
- Vf
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Velocity of past stream in cross flow, Greek symbols
- vf
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Kinematics viscosity of fluid
- ϕiv, ϕ0v
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crank angles for inlet and exhaust valves
- ϕ0
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Crank angle for one complete cycle
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© 2025 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Original Research Articles
- Modeling high-pressure viscosities of fatty acid esters and biodiesel fuels based on modified rough hard-sphere-chain model and deep learning method
- Study on heat and mass transfer mechanism of unsaturated porous media under CW laser irradiation: with and without carrier gas
- Efficient ecological function optimization for endoreversible Carnot heat pumps
- Entropy as Noether charge for quasistatic gradient flow
- Numerical simulation of binary convection within the Soret regime in a tilted cylinder
- Is there a need for an extended phase definition for systems far from equilibrium?
- Existence of the Chapman–Enskog solution and its relation with first-order dissipative fluid theories
- Performance comparison of water towers and combined pumped hydro and compressed gas system and proposing a novel hybrid system to energy storage with a case study of a 50 MW wind farm
- Thermodynamic characterization of transient valve temperatures in diesel engines using probabilistic methods
- Energetic analysis of a non-isothermal linear energy converter operated in reverse mode (I-LEC): heat pump
Artikel in diesem Heft
- Frontmatter
- Original Research Articles
- Modeling high-pressure viscosities of fatty acid esters and biodiesel fuels based on modified rough hard-sphere-chain model and deep learning method
- Study on heat and mass transfer mechanism of unsaturated porous media under CW laser irradiation: with and without carrier gas
- Efficient ecological function optimization for endoreversible Carnot heat pumps
- Entropy as Noether charge for quasistatic gradient flow
- Numerical simulation of binary convection within the Soret regime in a tilted cylinder
- Is there a need for an extended phase definition for systems far from equilibrium?
- Existence of the Chapman–Enskog solution and its relation with first-order dissipative fluid theories
- Performance comparison of water towers and combined pumped hydro and compressed gas system and proposing a novel hybrid system to energy storage with a case study of a 50 MW wind farm
- Thermodynamic characterization of transient valve temperatures in diesel engines using probabilistic methods
- Energetic analysis of a non-isothermal linear energy converter operated in reverse mode (I-LEC): heat pump
